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linux/include/net
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Duoming Zhou d01ffb9eee ax25: add refcount in ax25_dev to avoid UAF bugs 
If we dereference ax25_dev after we call kfree(ax25_dev) in
ax25_dev_device_down(), it will lead to concurrency UAF bugs.
There are eight syscall functions suffer from UAF bugs, include
ax25_bind(), ax25_release(), ax25_connect(), ax25_ioctl(),
ax25_getname(), ax25_sendmsg(), ax25_getsockopt() and
ax25_info_show().

One of the concurrency UAF can be shown as below:

  (USE)                       |    (FREE)
                              |  ax25_device_event
                              |    ax25_dev_device_down
ax25_bind                     |    ...
  ...                         |      kfree(ax25_dev)
  ax25_fillin_cb()            |    ...
    ax25_fillin_cb_from_dev() |
  ...                         |

The root cause of UAF bugs is that kfree(ax25_dev) in
ax25_dev_device_down() is not protected by any locks.
When ax25_dev, which there are still pointers point to,
is released, the concurrency UAF bug will happen.

This patch introduces refcount into ax25_dev in order to
guarantee that there are no pointers point to it when ax25_dev
is released.

Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
2022-01-28 14:56:47 +00:00
..
9p
net/p9: load default transports
2022-01-10 10:00:09 +09:00
bluetooth
Bluetooth: hci_event: Rework hci_inquiry_result_with_rssi_evt
2022-01-06 14:57:09 +01:00
caif
net: remove the caif_hsi driver
2021-07-01 13:19:48 -07:00
iucv
net/af_iucv: Use struct_group() to zero struct iucv_sock region
2021-11-19 11:52:25 +00:00
netfilter
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
2022-01-09 15:59:23 -08:00
netns
Namespaceify mtu_expires sysctl
2022-01-04 12:40:22 +00:00
nfc
NFC: add NCI_UNREG flag to eliminate the race
2021-11-17 20:17:05 -08:00
phonet
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 336
2019-06-05 17:37:07 +02:00
sctp
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-01-05 14:36:10 -08:00
tc_act
flow_offload: add index to flow_action_entry structure
2021-12-19 14:08:47 +00:00
6lowpan.h
6lowpan: Replace zero-length array with flexible-array member
2020-02-28 14:51:30 +01:00
act_api.h
flow_offload: validate flags of filter and actions
2021-12-19 14:08:48 +00:00
addrconf.h
Revert "ipv6: Honor all IPv6 PIO Valid Lifetime values"
2022-01-27 13:35:14 +00:00
af_ieee802154.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
af_rxrpc.h
afs: Don't truncate iter during data fetch
2021-04-23 10:17:26 +01:00
af_unix.h
af_unix: Replace the big lock with small locks.
2021-11-26 18:01:58 -08:00
af_vsock.h
af_vsock: rest of SEQPACKET support
2021-06-11 13:32:46 -07:00
ah.h
…
amt.h
amt: add mld report message handler
2021-11-01 13:36:09 +00:00
arp.h
neigh: introduce neigh_confirm() helper function
2021-11-23 11:51:37 +00:00
atmclip.h
…
ax25.h
ax25: add refcount in ax25_dev to avoid UAF bugs
2022-01-28 14:56:47 +00:00
ax88796.h
ax88796: export ax_NS8390_init() hook
2021-08-03 13:05:25 +01:00
bareudp.h
bareudp: Move definition of struct bareudp_conf to bareudp.c
2021-12-13 12:34:09 +00:00
bond_3ad.h
bonding: add new option lacp_active
2021-08-03 11:50:22 +01:00
bond_alb.h
bonding: make tx_rebalance_counter an atomic
2021-12-03 14:16:48 +00:00
bond_options.h
Bonding: add arp_missed_max option
2021-11-30 12:15:58 +00:00
bonding.h
bonding: use rcu_dereference_rtnl when get bonding active slave
2022-01-24 11:57:38 +00:00
bpf_sk_storage.h
bpf: struct sock is declared twice in bpf_sk_storage header
2021-03-26 17:43:55 +01:00
busy_poll.h
tcp: fix another uninit-value (sk_rx_queue_mapping)
2021-12-03 14:15:49 +00:00
calipso.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
cfg80211-wext.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
cfg80211.h
nl80211: Add support to set AP settings flags with single attribute
2021-12-20 10:41:26 +01:00
cfg802154.h
cfg802154: Replace zero-length array with flexible-array member
2020-02-29 14:39:08 +01:00
checksum.h
net: fix recent csum changes
2021-12-06 16:26:46 -08:00
cipso_ipv4.h
cipso: Remove unused inline functions
2020-07-15 07:45:24 -07:00
cls_cgroup.h
bpf: Allow to retrieve cgroup v1 classid from v2 hooks
2020-03-27 19:40:38 -07:00
codel_impl.h
codel: remove unnecessary sock.h include
2021-12-22 15:03:47 -08:00
codel_qdisc.h
codel: remove unnecessary pkt_sched.h include
2021-12-22 15:03:51 -08:00
codel.h
codel: remove unnecessary pkt_sched.h include
2021-12-22 15:03:51 -08:00
compat.h
net/ipv4/ipv6: Replace one-element arraya with flexible-array members
2021-08-05 11:46:42 +01:00
datalink.h
llc/snap: constify dev_addr passing
2021-10-13 09:40:46 -07:00
dcbevent.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201
2019-05-30 11:29:52 -07:00
dcbnl.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201
2019-05-30 11:29:52 -07:00
devlink.h
devlink: Add new "event_eq_size" generic device param
2021-12-21 19:08:54 -08:00
dn_dev.h
…
dn_fib.h
net: convert fib_treeref from int to refcount_t
2021-07-30 15:33:24 +02:00
dn_neigh.h
…
dn_nsp.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 24
2019-05-21 11:52:39 +02:00
dn_route.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 24
2019-05-21 11:52:39 +02:00
dn.h
decnet: constify dev_addr passing
2021-10-13 09:40:46 -07:00
dsa.h
net: dsa: warn about dsa_port and dsa_switch bit fields being non atomic
2022-01-06 12:16:21 +00:00
dsfield.h
ipv6: Annotate bitwise IPv6 dsfield pointer cast
2019-12-16 16:09:44 -08:00
dst_cache.h
wireguard: device: reset peer src endpoint when netns exits
2021-11-29 19:50:45 -08:00
dst_metadata.h
net: validate lwtstate->data before returning from skb_tunnel_info()
2021-07-09 13:55:53 -07:00
dst_ops.h
net/dst: use a smaller percpu_counter batch for dst entries accounting
2020-05-08 21:33:33 -07:00
dst.h
net: dst: add net device refcount tracking to dst_entry
2021-12-06 16:05:10 -08:00
erspan.h
erspan: Add type I version 0 support.
2020-05-05 13:23:29 -07:00
esp.h
ESP: Export esp_output_fill_trailer function
2020-02-19 13:52:32 +01:00
espintcp.h
xfrm: espintcp: save and call old ->sk_destruct
2020-04-20 07:34:16 +02:00
ethoc.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
failover.h
net: failover: add net device refcount tracker
2021-12-06 16:06:02 -08:00
fib_notifier.h
ipv6: Remove old route notifications and convert listeners
2019-12-24 22:37:30 -08:00
fib_rules.h
fib: expand fib_rule_policy
2021-12-16 07:18:35 -08:00
firewire.h
…
flow_dissector.h
cls_flower: Fix inability to match GRE/IPIP packets
2021-10-29 14:03:22 +01:00
flow_offload.h
flow_offload: allow user to offload tc action to net device
2021-12-19 14:08:48 +00:00
flow.h
flow: fix object-size-mismatch warning in flowi{4,6}_to_flowi_common()
2021-09-02 11:44:19 +01:00
fou.h
…
fq_impl.h
net/fq_impl: do not maintain a backlog-sorted list of flows
2021-01-21 13:33:45 +01:00
fq.h
net/fq_impl: do not maintain a backlog-sorted list of flows
2021-01-21 13:33:45 +01:00
garp.h
treewide: Use sizeof_field() macro
2019-12-09 10:36:44 -08:00
gen_stats.h
net: sched: Remove Qdisc::running sequence counter
2021-10-18 12:54:41 +01:00
genetlink.h
mptcp: avoid lock_fast usage in accept path
2021-02-12 16:31:46 -08:00
geneve.h
net: Move the definition of the default Geneve udp port to public header file
2019-03-22 12:09:31 -07:00
gre.h
ip_gre: add csum offload support for gre header
2021-01-29 20:39:14 -08:00
gro_cells.h
…
gro.h
net: fix recent csum changes
2021-12-06 16:26:46 -08:00
gtp.h
…
gue.h
GUE: Fix a typo
2020-06-22 21:12:44 -07:00
hwbm.h
net: hwbm: if CONFIG_NET_HWBM unset, make stub functions static
2019-10-25 16:24:32 -07:00
icmp.h
ipv6: ICMPV6: add response to ICMPV6 RFC 8335 PROBE messages
2021-06-28 14:29:45 -07:00
ieee80211_radiotap.h
mac80211: Use flex-array for radiotap header bitmap
2021-08-13 09:58:25 +02:00
ieee802154_netdev.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
if_inet6.h
ipv6: add net device refcount tracker to struct inet6_dev
2021-12-06 16:05:11 -08:00
ife.h
net: ife: drop include of module.h from net/ife.h
2019-04-22 21:50:53 -07:00
ila.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
inet6_connection_sock.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
inet6_hashtables.h
net: Track socket refcounts in skb_steal_sock()
2020-03-30 13:45:04 -07:00
inet_common.h
bpf: Allow rewriting to ports under ip_unprivileged_port_start
2021-01-27 18:18:15 -08:00
inet_connection_sock.h
dccp/tcp: Remove an unused argument in inet_csk_listen_start().
2021-11-23 20:16:18 -08:00
inet_ecn.h
net: add skb_get_dsfield() helper
2021-10-15 11:33:08 +01:00
inet_frag.h
inet: frags: annotate races around fqdir->dead and fqdir->high_thresh
2022-01-13 13:06:05 +00:00
inet_hashtables.h
tcp: seq_file: Replace listening_hash with lhash2
2021-07-23 16:44:57 -07:00
inet_sock.h
ipv4/raw: support binding to nonlocal addresses
2021-11-17 20:21:52 -08:00
inet_timewait_sock.h
tcp: honor SO_PRIORITY in TIME_WAIT state
2019-09-27 12:05:02 +02:00
inetpeer.h
net: ipv4: use a dedicated counter for icmp_v4 redirect packets
2019-02-08 21:50:15 -08:00
ioam6.h
ipv6: ioam: Distinguish input and output for hop-limit
2021-10-04 12:53:35 +01:00
ip6_checksum.h
net: move gro definitions to include/net/gro.h
2021-11-16 13:16:54 +00:00
ip6_fib.h
ipv6: annotate accesses to fn->fn_sernum
2022-01-20 20:18:37 -08:00
ip6_route.h
ipv6: ip6_skb_dst_mtu() cleanups
2021-11-19 20:09:55 -08:00
ip6_tunnel.h
ipv6: add net device refcount tracker to struct ip6_tnl
2021-12-06 16:05:11 -08:00
ip_fib.h
inet: add net device refcount tracker to struct fib_nh_common
2021-12-07 20:44:59 -08:00
ip_tunnels.h
sit: add net device refcount tracking to ip_tunnel
2021-12-06 16:05:11 -08:00
ip_vs.h
ipvs: add sysctl_run_estimation to support disable estimation
2021-10-07 19:52:58 +02:00
ip.h
ipv4: avoid using shared IP generator for connected sockets
2022-01-27 08:37:02 -08:00
ipcomp.h
…
ipconfig.h
…
ipv6_frag.h
inet: frags: annotate races around fqdir->dead and fqdir->high_thresh
2022-01-13 13:06:05 +00:00
ipv6_stubs.h
net: ipv6: add fib6_nh_release_dsts stub
2021-11-22 15:44:49 +00:00
ipv6.h
net: Don't include filter.h from net/sock.h
2021-12-29 08:48:14 -08:00
iw_handler.h
…
kcm.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
l3mdev.h
l3mdev: add infrastructure for table to VRF mapping
2020-06-20 17:22:22 -07:00
lag.h
…
lapb.h
net: lapb: Make "lapb_t1timer_running" able to detect an already running timer
2021-03-23 14:14:50 -07:00
lib80211.h
…
llc_c_ac.h
…
llc_c_ev.h
…
llc_c_st.h
…
llc_conn.h
llc: add net device refcount tracker
2021-12-07 20:44:59 -08:00
llc_if.h
llc/snap: constify dev_addr passing
2021-10-13 09:40:46 -07:00
llc_pdu.h
net: llc: fix skb_over_panic
2021-07-27 13:05:56 +01:00
llc_s_ac.h
…
llc_s_ev.h
…
llc_s_st.h
…
llc_sap.h
…
llc.h
llc: fix out-of-bound array index in llc_sk_dev_hash()
2021-11-07 19:25:29 +00:00
lwtunnel.h
netfilter: add netfilter hooks to SRv6 data plane
2021-08-30 01:51:36 +02:00
mac80211.h
mac80211: Add stations iterator where the iterator function may sleep
2022-01-04 15:47:15 +01:00
mac802154.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174
2019-05-30 11:26:41 -07:00
macsec.h
net: macsec: fix the length used to copy the key for offloading
2021-06-24 12:41:12 -07:00
mctp.h
mctp: Pass flow data & flow release events to drivers
2021-10-29 13:23:51 +01:00
mctpdevice.h
mctp: Pass flow data & flow release events to drivers
2021-10-29 13:23:51 +01:00
mip6.h
net: mip6: Replace zero-length array with flexible-array member
2020-03-02 11:16:27 -08:00
mld.h
mld: add new workqueues for process mld events
2021-03-26 15:14:56 -07:00
mpls_iptunnel.h
net: mpls: Replace zero-length array with flexible-array member
2020-02-28 12:08:37 -08:00
mpls.h
net: Make mpls_entry_encode() available for generic users
2020-05-29 21:20:20 -07:00
mptcp.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-10-28 10:43:58 -07:00
mrp.h
treewide: Use sizeof_field() macro
2019-12-09 10:36:44 -08:00
ncsi.h
…
ndisc.h
neigh: introduce neigh_confirm() helper function
2021-11-23 11:51:37 +00:00
neighbour.h
net: add net device refcount tracker to struct neigh_parms
2021-12-06 16:05:11 -08:00
net_failover.h
…
net_namespace.h
net: add networking namespace refcount tracker
2021-12-10 06:38:26 -08:00
net_ratelimit.h
…
net_trackers.h
net: add networking namespace refcount tracker
2021-12-10 06:38:26 -08:00
netevent.h
…
netlabel.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
netlink.h
net: netlink: add the case when nlh is NULL
2021-07-27 11:43:50 +01:00
netprio_cgroup.h
netprio: use css ID instead of cgroup ID
2019-11-12 08:18:03 -08:00
netrom.h
net: netrom: Fix error cleanup path of nr_proto_init
2019-04-11 13:59:49 -07:00
nexthop.h
net: ipv4: Fix rtnexthop len when RTA_FLOW is present
2021-09-24 14:07:10 +01:00
nl802154.h
net: ieee802154: handle iftypes as u32
2021-11-16 18:02:46 +01:00
nsh.h
…
p8022.h
…
page_pool.h
page_pool: Store the XDP mem id
2022-01-05 19:46:32 -08:00
pie.h
pie: realign comment
2020-03-04 13:25:55 -08:00
ping.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
pkt_cls.h
net: sched: do not allocate a tracker in tcf_exts_init()
2022-01-11 20:40:16 -08:00
pkt_sched.h
net: openvswitch: Fix ct_state nat flags for conns arriving from tc
2022-01-09 16:24:12 -08:00
pptp.h
…
protocol.h
net: Remove the member netns_ok
2021-05-17 15:29:35 -07:00
psample.h
psample: Add a fwd declaration for skbuff
2021-08-09 15:34:21 -07:00
psnap.h
…
raw.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rawv6.h
…
red.h
sch_red: fix off-by-one checks in red_check_params()
2021-03-25 17:40:43 -07:00
regulatory.h
net/wireless: regulatory.h: drop duplicate word in comment
2020-07-31 09:24:23 +02:00
request_sock.h
tcp: bpf: Optionally store mac header in TCP_SAVE_SYN
2020-08-24 14:35:00 -07:00
rose.h
rose: constify dev_addr passing
2021-10-13 09:40:45 -07:00
route.h
ipv4: remove sparse error in ip_neigh_gw4()
2022-01-27 08:38:33 -08:00
rpl.h
net: ipv6: Use struct_size() helper and kcalloc()
2020-06-23 20:27:09 -07:00
rsi_91x.h
…
rtnetlink.h
net: add extack arg for link ops
2021-08-04 10:01:26 +01:00
rtnh.h
net: Rename net/nexthop.h net/rtnh.h
2019-04-22 21:47:25 -07:00
sch_generic.h
net_sched: restore "mpu xxx" handling
2022-01-13 11:06:42 -08:00
scm.h
fs: Move __scm_install_fd() to __receive_fd()
2020-07-13 11:03:44 -07:00
secure_seq.h
…
seg6_hmac.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
seg6_local.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
seg6.h
udp6: Use Segment Routing Header for dest address if present
2022-01-04 12:17:35 +00:00
selftests.h
net: selftest: fix build issue if INET is disabled
2021-04-28 14:06:45 -07:00
slhc_vj.h
…
smc.h
net/smc: introduce CHID callback for ISM devices
2020-09-28 15:19:03 -07:00
snmp.h
net/tls: add skeleton of MIB statistics
2019-10-05 16:29:00 -07:00
sock_reuseport.h
tcp: Add reuseport_migrate_sock() to select a new listener.
2021-06-15 18:01:05 +02:00
sock.h
net: bpf: Handle return value of BPF_CGROUP_RUN_PROG_INET{4,6}_POST_BIND()
2022-01-06 17:08:35 -08:00
Space.h
wan: remove sbni/granch driver
2021-08-03 13:05:26 +01:00
stp.h
…
strparser.h
bpf, sockmap: sk_skb data_end access incorrect when src_reg = dst_reg
2021-11-09 01:05:34 +01:00
switchdev.h
net: switchdev: merge switchdev_handle_fdb_{add,del}_to_device
2021-10-27 14:54:02 +01:00
tcp_states.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp.h
tcp: Add a stub for sk_defer_free_flush()
2022-01-20 20:17:32 -08:00
timewait_sock.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tipc.h
…
tls_toe.h
net/tls: rename tls_hw_* functions tls_toe_*
2019-10-04 14:07:07 -07:00
tls.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2021-10-28 10:43:58 -07:00
transp_v6.h
tcp: move ipv4_specific to tcp include file
2020-06-23 20:10:15 -07:00
tso.h
net: tso: cache transport header length
2020-06-18 20:46:23 -07:00
tun_proto.h
…
udp_tunnel.h
udp: call udp_encap_enable for v6 sockets when enabling encap
2021-02-04 18:37:14 -08:00
udp.h
net: move gro definitions to include/net/gro.h
2021-11-16 13:16:54 +00:00
udplite.h
…
vsock_addr.h
vsock: remove include/linux/vm_sockets.h file
2019-11-14 18:12:17 -08:00
vxlan.h
net: vxlan: add macro definition for number of IANA VXLAN-GPE port
2021-11-29 12:19:53 +00:00
wext.h
…
x25.h
net/x25: add new state X25_STATE_5
2019-12-09 10:28:43 -08:00
x25device.h
…
xdp_priv.h
xsk: Wipe out dead zero_copy_allocator declarations
2021-12-14 00:24:24 +01:00
xdp_sock_drv.h
xsk: Batched buffer allocation for the pool
2021-09-28 00:18:34 +02:00
xdp_sock.h
net: Don't include filter.h from net/sock.h
2021-12-29 08:48:14 -08:00
xdp.h
xdp: Allow registering memory model without rxq reference
2022-01-05 19:46:32 -08:00
xfrm.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2022-01-09 17:00:17 -08:00
xsk_buff_pool.h
xsk: Optimize for aligned case
2021-09-28 00:18:35 +02:00